This study aims to analyze the effect of the performance of the Maqashid Syariah Index Abu Zahrah from the aspects of Tahdzib al fard, Iqamah al-adl, and Jalb al-Maslahah on the Efficiency Level of Indonesian Islamic Banks. This study is included in the type of quantitative research with technical data collection documentation and using secondary data in the form of financial reports. This study uses the Financial Report of PT. Bank Syariah Indonesia for the period 2021-2024. This period was chosen because it reflects significant dynamics that affect the performance and public perception of BSI, which was caused by the system hacking incident (Cyber Attack) and the massive withdrawal of funds by PP Muhammadiyah. The results of this study are that Maqashid Syariah in terms of Educating individuals (Tahdhib al-fard) has a positive and significant effect on the Efficiency Level of Indonesian Islamic Banks, which means that when Islamic banks have profits, it is obligatory for Islamic banks to also distribute these profits in accordance with sharia rules. Maqashid Syariah in terms of Upholding justice (Iqamah al-‘Adl) has a negative and insignificant effect on the Efficiency Level of Indonesian Islamic Banks. This indicates that the higher the enforcement of justice, the less effect it has on reducing efficiency. Maqashid Syariah in terms of Generating benefits (Jalb al-Maslahah) has a positive and significant effect on the Efficiency Level of Indonesian Islamic Banks. This means that the higher the level of application of the principle of benefits in bank operations, the higher the efficiency of Islamic banks. Overall, this study shows that the dimensions of individual welfare and education of maqashid sharia are the main strengths in supporting the BSI Efficiency Level. On the other hand, justice, although important in principle, needs to be improved in terms of implementation so that it is more felt by the community and has a real impact on the bank's financial performance.
                        
                        
                        
                        
                            
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